3913405 has 16 divisors (see below), whose sum is σ = 4918320. Its totient is φ = 2985472.

The previous prime is 3913397. The next prime is 3913421. The reversal of 3913405 is 5043193.

It can be written as a sum of positive squares in 8 ways, for example, as 356409 + 3556996 = 597^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 3913405 - 2³ = 3913397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3913405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19767 + ... + 19963.

It is an arithmetic number, because the mean of its divisors is an integer number (307395).

Almost surely, 2^3913405 is an apocalyptic number.

It is an amenable number.

3913405 is a deficient number, since it is larger than the sum of its proper divisors (1004915).

3913405 is a wasteful number, since it uses less digits than its factorization.

3913405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 3913405 is about 1978.2327972208. The cubic root of 3913405 is about 157.5862297613.

Adding to 3913405 its reverse (5043193), we get a palindrome (8956598).

The spelling of 3913405 in words is "three million, nine hundred thirteen thousand, four hundred five".